Q. An entity in A is associated with at most one entity in B, and an entity in B is associated with at most one entity in A.This is called as

View solution

Q. An entity in A is associated with at most one entity in B. An entity in B, however, can be associated with any number (zero or more) of entities in A.

View solution

Q. Which one of the following is a set of one or more attributes taken collectively to uniquely identify a record?

View solution

Q. Consider attributes ID , CITY and NAME . Which one of this can be considered as a super key ?

View solution

Q. The subset of super key is a candidate key under what condition ?

View solution

Q. Which type of entity cannot exist in the database unless another type of entity also exists in the database, but does not require that the identifier of that other entity be included as part of its own identifier?

View solution

Q. In a one-to-many relationship, the entity that is on the one side of the relationship is called a(n) ________ entity.

View solution

Q. Which type of entity represents an actual occurrence of an associated generalized entity?

View solution

Q. A recursive relationship is a relationship between an entity and ________ .

View solution

Q. Which of the following indicates the minimum number of entities that must be involved in a relationship?

View solution

Q. Which of the following refers to something that can be identified in the users' work environment, something that the users want to track?

View solution

Q. In which of the following is a single-entity instance of one type related to many entity instances of another type?

View solution

Q. Which of the following refers to an entity in which the identifier of one entity includes the identifier of another entity?

View solution

Q. Which type of entity is related to two or more associated entities that each contain specialized attributes that apply to some but not all of the instances of the entity?

View solution

Q. An attribute that names or identifies entity instances is a(n):

View solution

Q. Properties that describe the characteristics of entities are called:

View solution

Q. In which of the following can many entity instances of one type be related to many entity instances of another type?

View solution

Q. Entities of a given type are grouped into a(n):

View solution

Q. Which of the following is NOT a E-R model of all versions of the E-R model?

View solution

Q. In which of the following is a single-entity instance of one type of related to a single-entity instance of another type?

View solution